diff --git a/README.md b/README.md
index 472dee0..0528769 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,9 @@ $ sudo pip3 install bogo
 
 $ make
 
-# Run a Gtk+ 2 app with bogo.  Candidates
-# include: pluma, terminator, firefox, chromium, etc.
+# Run a Gtk+ 2 app with bogo.  Candidates include: pluma, terminator,
+# firefox, chromium, etc.  Note that you HAVE to be clear about the
+# Gtk version as loading Gtk 2's plugin in a Gtk 3 app will crash it.
 $ make run GTK=2 CMD=pluma
 
 # or Gtk+ 3: